package com.gh.security.filter;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.gh.security.entity.SecurityUser;
import com.gh.security.entity.User;
import com.gh.security.security.TokenManager;
import com.gh.utils.utils.R;
import com.gh.utils.utils.ResponseUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
import org.springframework.stereotype.Component;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.ArrayList;

/**
 * @Author Eric
 * @Date 2021/7/7 21:25
 * @Version 1.0
 * 认证过滤器
 */
public class TokenLoginFilter extends UsernamePasswordAuthenticationFilter {

    private TokenManager tokenManager;
    private RedisTemplate redisTemplate;
    private AuthenticationManager authenticationManager;

    public TokenLoginFilter(AuthenticationManager authenticationManager, TokenManager tokenManager, RedisTemplate redisTemplate) {
        this.authenticationManager = authenticationManager;
        this.tokenManager = tokenManager;
        this.redisTemplate = redisTemplate;
        this.setPostOnly(false);
        this.setRequiresAuthenticationRequestMatcher(new AntPathRequestMatcher("/admin/acl/login","POST"));
    }

    //1 获取表单提交用户名和密码
    @Override
    public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response)
            throws AuthenticationException {
        //获取表单提交数据
        try {
            User user = new ObjectMapper().readValue(request.getInputStream(), User.class);
            return authenticationManager.authenticate(new UsernamePasswordAuthenticationToken(user.getUsername(),user.getPassword(),
                    new ArrayList<>()));
        } catch (IOException e) {
            e.printStackTrace();
            throw new RuntimeException();
        }
    }

    //2 认证成功调用的方法
    @Override
    protected void successfulAuthentication(HttpServletRequest request,
                                            HttpServletResponse response, FilterChain chain, Authentication authResult)
            throws IOException, ServletException {
        //认证成功，得到认证成功之后用户信息
        SecurityUser user = (SecurityUser)authResult.getPrincipal();
        //根据用户名生成token
        String token = tokenManager.createToken(user.getCurrentUserInfo().getUsername());
        //把用户名称和用户权限列表放到redis
        redisTemplate.opsForValue().set(user.getCurrentUserInfo().getUsername(),user.getPermissionValueList());
        //返回token
        ResponseUtil.out(response, R.ok().data("token",token));
    }

    //3 认证失败调用的方法
    protected void unsuccessfulAuthentication(HttpServletRequest request, HttpServletResponse response, AuthenticationException failed)
            throws IOException, ServletException {
        ResponseUtil.out(response, R.error());
    }
}

//public class TokenLoginFilter extends UsernamePasswordAuthenticationFilter {
//
//    private TokenManager tokenManager;
//    private RedisTemplate redisTemplate;
//    private AuthenticationManager authenticationManager;
//
//    public TokenLoginFilter(AuthenticationManager authenticationManager, TokenManager tokenManager, RedisTemplate redisTemplate) {
//        this.authenticationManager = authenticationManager;
//        this.tokenManager = tokenManager;
//        this.redisTemplate = redisTemplate;
//        this.setPostOnly(false);
//        this.setRequiresAuthenticationRequestMatcher(new AntPathRequestMatcher("/admin/acl/login","POST"));
//    }
//
//    //获取表单提交的用户名和密码
//    @Override
//    public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response)
//            throws AuthenticationException{
//        //获取表单提交数据
//        try {
//            User user = new ObjectMapper().readValue(request.getInputStream(), User.class);
//            return authenticationManager.authenticate(new UsernamePasswordAuthenticationToken(user.getUsername(),user.getPassword(),
//                    new ArrayList<>()));
//        } catch (IOException e) {
//            e.printStackTrace();
//            return null;
//        }
//
//    }
//
//    //认证成功调用的方法
//    @Override
//    protected void successfulAuthentication(HttpServletRequest request, HttpServletResponse response, FilterChain chain, Authentication authResult)
//            throws IOException, ServletException {
//        //认证成功,得到认证成功用户信息
//        SecurityUser user = (SecurityUser) authResult.getPrincipal();
//        //根据用户名生成token
//        String token = tokenManager.createToken(user.getCurrentUserInfo().getUsername());
//        //把用户名称和权限列表放到redis
//        redisTemplate.opsForValue().set(user.getCurrentUserInfo().getUsername(),user.getPermissionValueList());
//        //返回token
//        ResponseUtil.out(response, R.ok().data("token",token));
//    }
//    //认证失败调用的方法
//    @Override
//    protected void unsuccessfulAuthentication(HttpServletRequest request, HttpServletResponse response, AuthenticationException failed)
//            throws IOException, ServletException {
//        ResponseUtil.out(response, R.error());
//    }
//}
